Improvement in machines foe gbinding and polishing



Leners Parent No; 65,942. am? .me is, 1867.

IMPROVEMENT IN MAGHINES PGB GRINDIG AND P QLISHING.,

'die Stlgshnlz nfctnx tu in .tlgeselrgieiterr atmt :uit making'pmt nf thieme.

TO ALL WHOM IT MAY CONCERN: y

Be it known that I, THOMAS Pnossnii, ofthe city, connty,"and State of New York, have invented a certain nerr and useful Improvement in `Grinding and Polishing-Machines, of which-thc followingis a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which v I *i Figure-1 represents a plan of a grinding machine constructed laccording to `my invention.

Figure 2, a longitudinal vertical section thereof through the line at a: in tig. l.

j Figure 3, a front or end elevation ofthe same; and

Figure 4, a vertical"sectionvtaken asdenoted by. the linefzfz in iig. 1.

Like letters indicate like parts throughoutthevseveraliigures y The nature of my invention consists, firstly, in a novel combination of a revolving grinding-wheel and c ar. riage or-'vise for holding the workto be ground, the latter having, in Vaddition 'to a reciprocating motion across' th periphery of the grinder, .and in addition to' the feed, an adjustability on the bed thatcarries it, to .giveit a parallel, or angular set relatively to the axis Vof the grinder; n n'd, further, consists 'ina like combination in whicl the carriage is provided with a revolving mandrel that serves to rotate the work.; and of a similar combination made to automatically establishthe feed of the work tothe grinder, or latter'to the former; likewise, in a novelcombination,'with a reciprocating carriage, of an adjustable friction-wheel contrivance and feedconnecting devices, tofacilitate change -of the feed from an'anttnnaticA tota hand one;v and in a peculiar double- Wlieel pawl escapement feeding motion set inactionby the .reciprocating carriage. For the information of others whom it `may concern, I proceed to describe my invention with reference-to the accompanying drawings, in whichl i i A A represents the grinder or polisher, that maybe of any proper material or suitably coated on its peripheryv according tothe grinding'or polishing Work it is required to perform, androther cileu'mstances, butwhich it- -will suiiice here to describe as a grinding-wheel of any desired diameter andrwidth o i its face, mounted on a horizontal shaft, FB, andna-rrang'ed-as, say, for grindingcylindrical or conicalbodies. IC is a pulley on the shaft B, for giviug the necessary revolvingimotion b'ybelt from a prime or other mover to the-grinding-Wh'eelA, the shaft of which works in bearings on a frame, D. At the one end of this fralne is a bed-plate, E, arranged, in the present instance, to worker be adjusted by V-slides, towards and from the grinding edge of the wheel A, and having mounted o-n it a cross s lidin'g'upper plate or bed,-F,ftravelling p arallel with the. axis of the wheel A. '.lh'isupper plate has. arranged,on` 'itthe vise i'vhiclrholds 'the 'Work to be operated on. For grinding 'arbors, spindles, and 'othercylindricah also'conical, bodies, this vise inay consistof 4afcarriage frame, G,- extending lengthwise ofjtheupper'plate Ffavnd secured thereon by screw-bolts b, fitting through curvilinear .slots c, in projections atjtlie ends ofV saidfraiieG, to'admit. of the latter being adj'usted'on the face of the sliding-plate F, Aso as to present the ivorkfto the` wheel A atdifferent angles or rather different positions relatively to the periphery thereof, accordinglyas the Work is vcylindrical or conical. lThis-,will' be readily understood. Snpposing the spindle or other work, to beheld by centresd dat opposite ends of the frame G, and the latter, with its work, to be. reciprocated a 'direction parallel with the axis of the wheel `Af'by the travel of the upper pla-tc F, thenby merely adjnstingjthe frame G- through the slots c and boltstyon the plateF, so that the centres i d .hold the work in suchlposition relatively to the grindingLwheelias that its line of travel next to and across the periphery oi thewheel A. .rvill always be parallel n'ith the axisof thelatter, then it is immaterial whether the Work be cylindrical or conical, the grinding course stands the same. The oncentre d is connected with Va live spindleor head-stock mandrelg'H, which is made hollow,and,.working in bearings e, at one end' of the frame G, is rotated by belt passing round a pulley, in thejsame direction as the grinding-wheel, so th'at the pcriphcries of said wheel and work pass each other in opposite directions, the work being made to turn withl the mandrel by gearingit thereto through a clutch cr dog-s, as inlathe-work, or in any-other suitablemannenzor said mandrel may be furnished witha faceplate. The opposite or back centre d forms-part of an ordinary-latl1e-pnppet, which may be adjustable or not onthe frame that forms the carriage, separately considered, or in connection yvitithecross sliding-bed F, whilethehead-stock mandrel and puppet at'woppcste ends of the frame G constitute, in connectiorrwith the latter, the vise proper, which, however, may be otherwise constructed according to the character ofthe work' it is required to hold or description of work to be done.v To' feed the work up` tothe wheel A, n shaft, I, may be employed, having on its inner 'end a screwLtbread, which works through a box, g, attached to the bed-plateE, and which has at its outer end a hand-wheel, h, but this, insteadfofla ,hand-feed, may be'lnade automatic, as hereinafter described, or either may housed at option of the operative.

The work to be ground it is proposed, according tothe arrangement shown in the drawings, to reciprocate across the periphery of the `grinding-wheel, as already referred to. This-may be done by the following means, though others may be used, which remark applies also to the details connected with the feed'of the `Work up -to' the wheel. Attached to the frame D are brackets i', which serve to carry a shaft, j, that isprovided'with en endless screw, lc', and which may be driven by belt passed round any one of a scriesof pulleys, It It:2 lcs, according to thespeed required, said endless screw gearing with and serving to drivea worm-wheel, l, that is mounted on a hollow shaft, wt, having its bearing in asleeve, n, that projects from the frame D. This hollow shaft m has arranged within it a shaft, J, that is made to rotate with the hollow shaft m', but at liberty to slide lengthwise therein by means of a feather and groove connection of said shafts. On the inner end ofthe shaft'J is sec'ur'ed" a crank', K, which may have a variable throw by providing it with a. series of holes at different distances-from its centre on the saine or opposite sides thereof, through any one of which holes the pinis passed that connects a pitman, L, with the upper bed-plate F bya bracket, o. By this means, it will he seen, the carriage holding thev work is reeiprocatcd to and fro across the periphery of the wheel A, the reciprocatingstroke being governed by the throw of the crank, according to 'the length ofthe piece to be ground, while, by the sliding connection of the shaft J with the hollow shaft m, sach reciprooation in'no ways interfereswith the feed of the work upto the wheel by 'thc shaftl, nor yet thc latter action with the fermer. l l* As it is desirable in many instances tonmkethe feed c-f the work np to the Lgrinding-whecl automatic, that is, to give a resh feed each single reciprocating action, or travelin cach direction of the carriage or vise, this I propose to do as follows, though other means or details may be substituted: Thel hand feed wheel h is formed withI a wedge-shaped periphery, which fits into a V-grooved wheel or disk, p, made fast to a shaft, q, that works in suitable bearings, and iii-.1y be set by lncans ot' :t bindingscrcw,'r, tothrow'more or less friction of the Wheel 1) on the hand-whecl/z, so as to canse the former to drive the latter and its screw-shaft I. VOn the inner'end of the shaft j is a spur-wheel, s, that meshes into nctnrcspondingwheel,l a', hung on an independent shaft carried by an arm ot" the brut-ketf, lwhich is attached to the bed-plate E. On the lupper bed or plate E, at a suitable distance apart from each other, and which distance may be varied by making them adjustable, so as to regulate the amount of fccd'eaclrtinie and to adapt them to any alteration in the reciprocating stroke ofthe carriage, are.. .pivotcd dogs or pawls u u', which serve alternately, as the plate F reaches the termination of' its reciprocating stroke, to act first the one dog u against the wheel s, and then, on the return of said plate, the other dog u against the wheel s', which, by setting the wheels in motion, laires the necessary amount of. turn to the shaft (1 to set in motion the wheels p and z, and so work the screw-shaft l, that is, themore im'niediate means of establishing the feed. This arrangement may be denoininated adouble-wheel pawl esca-pement. Here it may be Y observed that therek is not only a smoothness ot' action hy using" friction-gear or wheels p h, but by simply .slackcning or, tightening up the binding-screwr, the feed may be instantly changed from an automatic to a hand one, and vice versa. In some cases the feed motion, automatically produced by the reciprocating motion ofA the, carriage or its bed-plate, may be applied directly to the carriage or t'o the grinding\vheel itself, as rnay be desirable, in grinding tires for locomotives or other large cixtelar work. v-

For internal grinding, as in boring, the grindingnvheel may work over neck," said wheel b cing of size to. work within the article to be ground. The position of the grinding-wheel may, in fact, be considerably varied. For instance, by having its axis parallelwith the reciprocating action of the vise or. carriage, it is capable n ot.

j only of doing lathe-work, but, to a limited extent,'planing also, though the latter may be more perfectly or fully accomplished by arranging said wheels axis at right angles to the reciprocating vise or carriage and over the latter; or it may be in line with the bed-plate of the carriage for boring cylinders and cones, also for externally turning the same, in which case the spindle or vmandrel should runl over the bed-plate and carry a faceplate, as in lathe-work, said face-plate and grinding-wheel both working over neck.

What I claim herein as new and useful, and desire to secure hy Letters Patent, is-f- 1. The combination of the wheels s s', pawls u u, friction-wheels p h, and screw I with the reciprocating carriage for establishing an automatic feed motion, substantially as specified.

2. The reciprocating carriage F, withits frame or vise G, made adjustable thereon, parallel or angularly to the axis of the grinding-wheel, in the manner described. 4

3L The friction gearwheels .h p, made adjustable as regards their binding action, one upon the other, sub stantiaily as'aud for the purpose set forth. I

THS. "PROSSER. Witnesses:

J. W. Commis, G. W. REED. 

